A healthy adult human excretes (on an average) _______ gm of urea/day.

Explanation

To solve the question regarding the average amount of urea excreted by a healthy adult human per day, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Context**: The question asks for the average daily excretion of urea in grams by a healthy adult human. Urea is a waste product formed from the breakdown of proteins in the body.

2. **Know the Process of Excretion**: Urea is primarily excreted through urine. The formation of urine is a key process in the excretion of waste products, including urea.

...